RE: [SI-LIST] : IC input impedance

Marin Sampaleanu (Marin.Sampaleanu.marsam@nt.com)
Wed, 14 Oct 1998 10:53:57 -0400

The frequeny to be used is the highest significant component in the clock
signal FFT.
As a rule of thumb the fifth harminic would be a good choice.

Any comments ?

Marin Sampaleanu
Nortel, Wireless Development Calgary.
> ----------
> From: Dima Smolyansky[SMTP:dima@tdasystems.com]
> Sent: Tuesday, October 13, 1998 9:18 AM
> To: 'Shimon_Turgeman@amat.com'
> Cc: si-list@silab.Eng.Sun.COM
> Subject: RE: [SI-LIST] : IC input impedance
>
> I would guess, the main harmonic of the clock, as it is at this frequency
> that you will get the most amplitude loss.
>
> BTW, if you estimate the R in the equation I proposed, it may swarm the
> value of 1/jwc in the overall impedance and make it negligible.
>
> Anybody, any other good ideas?
>
> Thanks,
>
> -Dima
> ============================
> Dima Smolyansky
> Marketing and System Development
> TDA Systems, Inc.
> 7465 SW Elmwood St.
> Portland, OR 97223
> (503) 977-3629
> (503) 245-5684
> dima@tdasystems.com
> http://www.tdasystems.com
>
>
> -----Original Message-----
> From: Shimon_Turgeman@amat.com [SMTP:Shimon_Turgeman@amat.com]
> Sent: Tuesday, October 13, 1998 6:52 AM
> To: Dima Smolyansky
> Subject: RE: [SI-LIST] : IC input impedance
>
> what is the relevant frequency w of j*w*c?
>
>
>
>
>
> Dima Smolyansky <dima@tdasystems.com> on 10/13/98 05:44:33 PM
>
> To: "'Shimon_Turgeman@amat.com'" <Shimon_Turgeman@hermes.mis.amat.com>,
> "si-list@silab.Eng.Sun.COM" <si-list@silab.Eng.Sun.COM>
> cc: (bcc: Shimon Turgeman/AME/APPLIED MATERIALS)
> Subject: RE: [SI-LIST] : IC input impedance
>
>
>
>
> I suppose, R+1/j*w*c?
>
> Thanks,
>
> -Dima
> ============================
> Dima Smolyansky
> TDA Systems, Inc.
> 7465 SW Elmwood St.
> Portland, OR 97223
> (503) 977-3629
> (503) 245-5684
> dima@tdasystems.com
> http://www.tdasystems.com
>
>
> -----Original Message-----
> From: Shimon_Turgeman@amat.com [SMTP:Shimon_Turgeman@amat.com]
> Sent: Tuesday, October 13, 1998 12:55 AM
> To: si-list@silab.Eng.Sun.COM
> Subject: [SI-LIST] : IC input impedance
>
> what is the input impedance of CMOS devices (for calculating the
> reflection
> coff.)as a function of input capacitance ? how I calculate this impedance
> ?
> what is the formula ?
>
> Best Regards
> Shimon Turgeman
> Applied Materials
>
>
>
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